:root{--ink:#14181f;--muted:#5b6472;--line:#e3e6eb;--bg:#fbfbfa;--card:#fff;--accent:#1f5fbf}
@media (prefers-color-scheme:dark){:root{--ink:#e9ecf1;--muted:#a3abb8;--line:#2a2f38;--bg:#12151a;--card:#181c22;--accent:#7fb0ff}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
a{color:var(--accent)}
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
.top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-top:28px;padding-bottom:28px;border-bottom:1px solid var(--line)}
.brand{font-weight:800;letter-spacing:.08em;color:var(--ink);text-decoration:none;font-size:18px}
nav{display:flex;gap:18px;flex-wrap:wrap}
nav a{color:var(--muted);text-decoration:none;font-size:15px}
nav a:hover{color:var(--ink)}
.hero{padding:72px 0 40px}
.kicker{text-transform:uppercase;letter-spacing:.14em;font-size:12px;color:var(--muted);margin:0 0 14px}
h1{font-size:clamp(32px,6vw,52px);line-height:1.08;margin:0 0 18px;letter-spacing:-.01em}
h2{font-size:20px;margin:36px 0 10px}
.lead{font-size:20px;color:var(--muted);max-width:640px;margin:0}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.cols ul{padding-left:20px;margin:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:4px 24px 20px;margin:48px 0}
.small{font-size:14px;color:var(--muted)}
.doc{padding-bottom:40px}
.doc article{padding:40px 0;border-bottom:1px solid var(--line)}
.doc article:last-child{border-bottom:0}
.doc h1{font-size:clamp(28px,5vw,40px)}
.doc p{max-width:720px}
.foot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;padding-bottom:40px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}
@media (max-width:640px){.cols{grid-template-columns:1fr}.hero{padding:44px 0 24px}.lead{font-size:18px}}